'It made the rounds of publishing houses, garnered a lot of interest but no offers.

'I've written a lot about my famous family, the Reagans -- maybe this was too much of a departure for publishers to wrap their heads around. But now there is KDP and the room to publish a book yourself. It's exciting to me -- a new era in publishing.'

Davis, who changed her surname to her mother's maiden name while at university, is well-known in the U.S. for her autobiographical books about growing up in the public eye and her clashes and later reconciliation with her parents Ronald and Nancy Reagan.

Her first book, Home Front, was published in 1986 and describes coming of age in the 1960s and 1970s.

Davis, who used to date Bernie Leadon from The Eagles, famously held liberal views, which often clashes with her conservative father including opposition to nuclear weapons, being pro-choice and supporting gay rights.

Davis later reconciled with her parents, especially as they coped with her father's Alzheimer's disease. She supported her mother during her father's lengthy public funeral in 2004.

In recent years she has also written books that portray her family in a more positive light.